Carbureter.



R. H. BAKER al E. w. MASON.

CARBURETER.

APPLICATION FILED IAN.23. |911.

1,292,229. 2 2 Patented Jan. 21,1919.

mz .um mnu an. manu-ma. 'Amma-mn. n c.

UNITED STATES PATEN T FFTCE.

ROBERT I-I. BAKER AN'D EARL W. MASON, OF SAN DIEGO, CALIFORNIA.

CARBURETER.

Specification of Letters Patent.

Patented Jan. 21, 191 9.

Application led January 23, 1917. Serial N o. 144,043.

To all whom it may concern:

Be it known that We, ROBERT H. BAKER and EARL W. MASON, citizens of theUnited States, residing at San Diego, in the county of San Diego, Stateof California, have invented new and useful Improvements in Carbureters,of which the following is a specification.

This invention relates to carbureters; and relates particularly to airinlet devices or air inlet control devices for carbureters.

We illustrate our invention as an attachment for a carbureter; but itwill of course be understood that our invention may be made a part ofthe carbureter if so desired. It is an object of our invention toprovide an air inlet control, automatic in its nature, which will supplythe proper amount of air to keep the carbureted mixture uniform inuality throughout all variations in speed,

rom low speed tohigh speed. And it is an object of ourv invention toprovide a device which may be attached to a carbureter, and one whichmay be adjusted, both as to high speed condition and as to low speedcondition, so that it will operate eiiciently in all cases.

Although our device is applicable to any kind of carbureter, itsparticular usefulness, as an attachment, is in connection withcarbureters which have no air inlet control valve or other similarmechanism; and in the accompanying drawings we show a preferred form ofdevice embodying our invention, applied as an attachment t0 a simple andwell known form of carbureter, which normally has no air inlet controlvalve or the like.

In the accompanying drawings Figure 1 is a side elevation of acarbureter, showing our device in vertical longitudinal section; andFig. 2 is a cross section taken as `indicated by line 2-2 on Fig. 1.

In the drawings the numeral 10 designates a simple form of carbureterhaving an air inlet 11 through which air is moved by suction into andthrough the carbureter. Our device embodies a suitable casting 12 havinga passage therethrough, which becomes, in ei'ect, an extension of theair inlet 11. This passage through the casting 12 has` a horizontalportion 13 and a vertical downwardly extending portion 14, asillustrated. On the sides of the vertical passage 14 we provide lateralopenings 15 which are small at their lower ends and increase in size asthey extend upwardly. In preferred form, these lateral passages 15 areof inverted cone shape. These lateral passages are, as illustrated, infree communication with the vertical main passage 14 at their innersides; being in reality mere side extensions of the main verticalpassage 14.

We provide a piston valve 20 of suitable weight, mounted upon the lowerend of a vertical valve rod 21. This valve rod 21 passes upwardlythrough a screw threaded adjusting sleeve 22; which sleeve is screwthreaded into the casting 12 and is provided with a lock nut 23 forsetting it in any adjusted position. Above the sleeve 22 the rod 21 isprovided with a nut 24 and lock nut 25; and a coiled spring 26 surroundsthe rod 21 beneath nut 24 and rests on the adjusting sleeve 22. A coiledspring 27 rests upon the piston valve 20, this coiled spring beingpreferably conical in formation. When the piston valve 20 is movedupwardly by the suction of air through the passage 14, spring 27 strikesthe lower end of adjustment sleeve 22 and thus forms a resilient stop tothe upward movement of the piston valve. The spring 26 and adjusting nut24 form a resilient stop to the downward movement of the piston valve20. The nut 24 is adjusted in position so that when the piston valve isin its lowermost position, as shown in Fig. 1, then a suficient4 amountof air may pass by the piston valve, through the side passages 15, tosupply the carbureter for low speed operation. The position ofadjustment sleeve 22 is set so that the piston valve 2O may risesuiiiciently to supply the carbureter with sufficient air for high speedoperation. When the carbureter is in operation at high speed, pistonvalve 20 moves freely upwardly (opposed only by gravity, which tends tomove the piston valve downwardly), until the spring 27 strikes the lowerend of adjustment sleeve 22: and then the spring 27 resiliently opposesfurther upward movement of the piston valve 20. The strength of thisspring 27 is initially determined to suit the carbureter to which thedevice is attached; so that, in case of excessive high speed, the pistonvalve may move farther upwardly, opposed by the spring 27. The spring 26forms a resilient stop to the downward movement of the piston valve; andthe two springs together prevent any clacking or humming noise whichwould otherwise be caused by the up and down vibration of the pistonvalve when the carbureter is in action.

It will be seen that our device may be adjusted irst Jfor high speedoperation, by adjustment of sleeve 22, and then adjusted for low speedoperation, byadjustment 4of the nut 24. The weight of the piston valve,and the strength of the spring 27 having been previously determined withdue regard lto the carbureter; then, when the proper adjustments varemade, the device will au-l tomatically admit the proper amount of air toform a uniform mixture in the carbureter at all speeds. We havedescribed a preferred form of device, with preferred adjustment means,etc., in some detail; but we do not consider our invention limited tothis .particular form, but consider it to include 'variations andchanges as they are included within the scope of the following claims.

VHaving described a preferred form of our invention, we claim:

1. YIn co bination with a carbureter having an lair inlet, a gravityoperated valve in the inlet, means comprising an adjustable member and aspring coperating with the valve to allow the valve a limited amount offree opening movement,the spring opposing the .opening movement of thevalve after the free opening movement.

Copies of this patent may be obtained for 2. In combination with acarbureter havinO an air inlet, a gravity operated valveV intthe inlet,adjustable means comprising' an adjustable member and a springcooperating with the valve to allow the valve a limited amount of 'reeopening movement, the spring opposing the opening movement of the valveYafter the free opening movement, and adjustable Vspringstop means forresiliently limiting the closing movement of said valve.

3. In combination with a carbureter having an air inlet with a downwardextension through which air flows upwardly to the carbureter, l.he wallsof said inlet extension.

per end vof the valve rod, and a coiled spring the nut and the upper endof theV between adjusting sleeve.

In witness that we claim the foregoing we have hereunto subscribed ournames this 8th day of January, 1,917.

ROBERT H. BAKER. EARL, W. MASON.

ve` cents each, by addressing the Commissioner of Patents.

Washington, D. C.

a valve rod eX-

